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Communication Dans Un Congrès Année : 2017

Universal Behavior of Few-Boson Systems Using Potential Models

A. Kievsky
M. Viviani
  • Fonction : Auteur
R. Álvarez-Rodríguez
  • Fonction : Auteur
A. Deltuva

Résumé

The universal behavior of a three-boson system close to the unitary limit is encoded in a simple dependence of many observables in terms of few parameters. For example the product of the three-body parameter $\kappa _*$ and the two-body scattering length a, $\kappa _* a$ depends on the angle $\xi $ defined by $E_3/E_2=\tan ^2\xi $ . A similar dependence is observed in the ratio $a_{AD}/a$ with $a_{AD}$ the boson-dimer scattering length. We use a two-parameter potential to determine this simple behavior and, as an application, to compute $a_{AD}$ for the case of three$^4$ He atoms.

Dates et versions

hal-01554527 , version 1 (03-07-2017)

Identifiants

Citer

A. Kievsky, M. Viviani, R. Álvarez-Rodríguez, M. Gattobigio, A. Deltuva. Universal Behavior of Few-Boson Systems Using Potential Models. 23rd European Conference on Few-Body Problems in Physics, Aug 2016, Aarhus, Denmark. pp.66, ⟨10.1007/s00601-017-1228-z⟩. ⟨hal-01554527⟩
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